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The principle and treatment process of Kaidi Cyclic Active Sludge Sequence System (KDCAS) reactor were introduced; the effects of nitrogen and phosphorus removal of the reactor with different water loads were analyzed. The results indicated that with their own structural characteristics, KDCAS reactor could gain a expected results of nitrogen and phosphorus removal completely, as long as process matrix...
The effects of pH on the hydrolysis and acidification from WAS in mesophilic and thermophilic anaerobic fermentation was investigated in this study. Both the mesophilic and thermophilic waste activated sludge (WAS) hydrolysis were improved significantly at alkaline pHs than at other pHs. Themophilic conditions improved the WAS hydrolysis compared to that mesophilic ones. The accumulation of short-chain...
Oily sludge, produced mostly in petroleum refineries and petrochemical industries, is one of the major industrial wastes that require treatment. The objective of this work was to recovery oil by washing of oily sludge with nonionic and anionic surfactant. To compare experimental results, three surfactants were used: sodium dodecylbenzene sulfonate (DBS), alkyl phenol polyoxyethylene ether (OP-10)...
This study has investigated the effect of humus soil activated sludge on the nitrogen and phosphorus removal. The results from experiments indicate that humus soil SBR (HS-SBR) process did not have a better effect on the COD removal compared it with SBR process. They had about 89% removal efficiency on average. HS-SBR process could enhance the removal of nutrient salt, especially TP. The removal efficiency...
With the rapid development of industry and agriculture, there are thousands of tons phosphate and nitrogen releasing into surface water. Phosphate becomes the main reason for eutrophication, resulting in deterioration of water quality. Ferric sludge from drinking waterworks was found to possess potential efficiency to remove phosphate ions from aqueous solutions. The maximum phosphate ions adsorption...
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